A drinking fountain.
A freshwater fish of central North America, the freshwater drum, Aplodinotus grunniens; so called from the noise it makes.
Something that emits bubbles.
An airstone for an aquarium.
A device used for smoking marijuana, similar to a cannabis pipe but with a section that holds water, like a bong
A heat-activated device that sprays water in the event of a fire, usually mounted on a ceiling.